Vishnupurana 3.14.13x29

Viṣṇupurāṇa 3.14.13x29

candrakṣaye māghavamāsi yatra dinakṣaye vai viṣuvaddvayaṃ ca
manvantarādyās tithayas tathaiva chāyāgajasya vyatipātakālaḥ //